Process for extracting products from resinous wood.



PATENTED DEC. 25, 1.905

, G B. DARRIN. v PROCESS FOR EXTRAOTING PRODUCTS FROM RBSINOUS WOOD.

APPLIOATION FILED JUNE 10. 1901.

R mi Q m% f a a W/TIVESSES UNITED STATES arana OFFICE.

CHARLES B. DARRIN, OF WALUA --;LLA, WASHINGTON.

Specification of Letters Patent.

Patented Dec. 2'5, 1906.

Application filed June 10,1901. Serial 110.63.865.

To (all whom it may concern:

Be it known that 1, CHARLES B. DARRIN, a

alia, in the county of 'VVallawalla and State of Washington, have nvented a certain new and useful improved Process for Extracting Products from Resinous Wood,

of which the following is a specification, reference being had therein to the accompanying drawings. v

My invention relates to the treatment of resinous woods, more particularly iir, by (lC-r structive distillation for extracting therefrom turpentine, pitch, tar, tar-oil, pyroligneous acid, from which'alcohol and. the acetates are produced, and the by-products, gas

and charcoal; andthe object of my invention is the speedy and efleetual extraction of the said products by a process \Vlll(3ll,'Vtllll-t it is specry and eil'ectual, shall at the same time be cheap and so simple that skilled labor is not essential.

My improved processwill be readily "II-1' derstood from the following description 111 connection with the accompanying drawings, in which v Figure 1 is ageneral view of the apparatus used for carrying out my process, the several principal members thereof being shown in vertical section; and Fig. 2 is a perspective view of the distributor 9 of Fig. 1.

A charge 'of resinous wood 2 is taken into a retort 3 upon a car 4, referab y through an openin in the end the retort, WhlCh is 3 c ose d uring operation by a door 5, adapted to be hermetically sealed. Steam under pressure'is then introduced into the retort by a perforated pipe or ipes Gto create a moist and diffusive heat t 'erein at a temperature of 340 Fahrenheit, approximately, which is maintained for from-one to two hours, according to the character of the wood, or until the greater part of the containedturpentine and pyroligneous acid within the chazge has volatilized and passed, commingled with the steam, through conduit '7' to, a condenser 8, where it is liquefied-and thence flows by pi e into a receiver 9, where by their (slpec' ic gravities it 'ise arates into two wlL, efined ayers ofqpyroigneous acid and turpentine;

- 'lhellattenjbeing-l the upper lone, is readily I drawn oil through a'pipe 10 to a collectingvat 11, and thence by a pipe 12 to a still 13,

' in which it is decolorized and clarified by be- ,ing mechanically mixed by a stirrer 14 with a 'f 'quantity of lime and Water (milk of lime) re- 3 ceived from a hopper or slaking-pan .15 I through a pipe 16, having a gate-valve 17 citizen of the United States, residing at Walla i therein. The solution of turpentine and li1ne-water is maintained by a-stoam-coil 18 at a temperature of 320 Fahrenheit, approximately, to evaporate the turpentine therefrom, which fumes are conducted by a pipe 19 to a condenser 20, where it is liquefied free from decolorization and otherwise refined. After the said vapors of turpentine and pyroligneous acid or the greater portion of them have been'wlriven oil the steam is shut oil from the retort and a the built upon a grate 21, provided thereunder, and maintained until the charge is completely distilled and the products thereof extracted under a temperature of from 1,000 to 2,000? Fahrenheit, vapors of tar, tar-oil, and pyroligneous acid passing throu h the aforesaid conduit and condenser 7 and 8, respectively, to be delivered 'as a liquid and permanent gases to the receiver 9, the liquid settling in layers, as aforesaid, and the as being extracted by a pump 23, which ex iausts into a suitable gasholdcr. Shortly after the steam is shut oil from the retort 3 and dry heat at an increased temperature is applied pitch exudes from the charge and is withdrawn into a receptacle (not shown in the drawings) by -a drain-pipe 34., having a gate-valve 35 and a cook 36 to regulate the flow. The tar which has not volatilized and passed with the other gases from the retort is finally drawn off through the draiii-pipe 3-1, leaving only the charcoal as the residual of the charge. Returning now to the receiver 9, where the con tents have settled into layers of tar, tar-oil, and pyroligneous acid, which may each be removed separately through a number of drawpipes 9 9" 10, provided at different heights,

the tar and tar-oil in their present state for commercial uses and the yroligneons acid to be further manipulated y any of the proccsses now in use, to obtain alcohol and are tates therefrom.

To accelerate the transmission of the vapors through the conduit 7, which might become choked by deposits from condensation between treatments of differentchar es, and

which condensations would stain or isc'olorv 'thejturpentine passing therethrough, I introduce steam into the said conduit through two pipes 25 and 26, which is controlled by valves therein and cut-oil 27. Durin the cleaning the cut-oil 27 is closed and t e steam adnutted through pipe 26 revaporizes or scours the inside. of the said conduit as well es the xpipes of condenser 8, the sediment bein lown ofi throughthreewsy valve 28 and outlet 29; In order to csrry. out my proce ss with precisioinl have invented a special receiver 9, Fig 2, consisting of a case having glass sidepan'els ends-number of outlets po- -sitionedct diii'ereiit heights by which the several component parts of the contained fluid 'asthey settle inleyerssre drawn oil,

fltheir'cholracteristics, such as color, their relatwe' positions due '-to their difference in weights being observed through the said glass, sndsny desired layer, as turpentine, -oil,i"or pyroligneous acid may be drawn oil through'the respective outlets.

j The-sfOre sing-described treatment or processicomp etely effects the I 1purposes for which it is intended, with the fol owing moreirnportcnt advantages: By the use of steam introduced through a perforated. pipe 01! 5? es throughout the, length of the retort s usiveor even heat is; obtained and the direct action-of the steam-upon the charge extracts a larger percentage of turpentine than is possible from the use ofdry heat alone.

The turpentine obtained "by my process-is freer from pitch-oils, 860., and therefore easier to clarify or'deoolorize; Steam also sets upon the chsrgeto'extrsct a greater quantity 1 see,

pitch of a, light color and superior in qualconducting the by-products to areceivcr,

separating the different hy-products in said receiver by theirsnecifie gravities, and conducting the lighter hy-product to a vet, fced--' ing said lighter by-products from said vet to a still, decolorizing and clarifying the said byproduct in stnd still while maintaining it at a temperature of approximately 320 Fahrenheit, carrying sway the turpentine fumes arising from said by-product during the clarificstion, and then applying dry heat to the retort to-extract. the pitch contained in the wood. 9

In testimony whereof I afiix my signature in presence of two witnesses.

H CHARLES BlDARRiN. I

Witnesses: V

PIERRE BARNES, W.'ID. PLUE. 

